Often they do go back and forth the whole way, and I don't know until the very end what the last line of the book is going to be. That was true here - the very last line of the book was the last thing that happened.

I'm heavily influenced by Edward Ardizzone, how he has people talking in little speech bubbles. I love those. And also Edward Gorey. Those are two of my favorite people.

Ideas mostly come from the work itself. Often when I'm drawing, the words will be bouncing around in my head, and when I'm writing, ideas about the drawing happen.

Some of it just involved thinking about, for example, the different kinds of science, what chemistry is.

I'm structured with time.

It's one of my favorite times of day. I'll have an array of notes, things that I want to think about. Something will start to take shape, and I'll play around with it. It's not usually an intense time. It's sort of a playful time. But it's when some really good thoughts arise.

I knew what infinity was. Being a previous art student, I knew about some art concepts.